The JTMH4002 is a low noise, constant frequency (1.2MHz) switched capacitor voltage doubler. It produces a regulated output voltage from 2.7V to 5V input with up to 250mA of output current. Low exter

一,产品概述(General Description)      

    The JTMH4002 is a low noise, constant frequency (1.2MHz) switched capacitor voltage
doubler. It produces a regulated output voltage from 2.7V to 5V input with up to 250mA of
output current. Low external parts count (one flying capacitor and two small bypass
capacitors at VIN and VOUT) make the JTMH4002 ideally suited for small, battery-powered
applications.
    The new charge-pump architecture maintains constant switching frequency to no load and
reduces both output and input ripple. The JTMH4002 have thermal shutdown capability and
can survive a continuous short circuit from VOUT to GND. Built-in soft-start circuitry prevents
excessive inrush current during start-up.
   The JTMH4002 is available in the 6-pin SOT-23 package.
二.产品特点(Features)

Fixed 5V±4% Output
VIN Range: 2.7V ～ 5V
Output Current: up to 250mA (VIN=4.5V)
Low Noise Constant Frequency Operation
Shutdown Current: <1μA
Short-Circuit Protection
Soft-start
No Inductors
Available in Low Profile 6-Lead SOT-23
Package
三,应用范围 (Applications)

White LED Backlighting
Li-Ion Battery Backup Supplies
Local 3V to 5V Conversion
Smart Card Readers
PCMCIA Local 5V Supplies
四.技术</span>规格书下载（产品PDF）</span>

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JTMH4002

五,产品封装图 (Package)



六.电路原理图</span>


七</span>,功能概述

Input Supply Voltage…………………….…………………………….…….….…..….……..-0.3V ～ 6V
EN Pin Voltage………………………………………………...…………………….…....……-0.3V ～ 6V
Output Voltage…..…………………………………………………………………………...-0.3V ～ 5.5V
Output Current ……………………….................................………………………...................... 300mA
Operating Temperature Range (Note 2)……………………………………..…….……-40℃ ～ +85℃</span>
Maximum Junction Temperature……….…………………………………………………………..+150℃</span>
Storage Temperature Range ……………………………………………...…..………..-65℃ ～ +125℃</span>
Lead Temperature (Soldering, 10 sec.) ……………………………………..………………….…+265℃</span>
八,相关芯片选择指南

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